ACR LGT FLT CREW MADE GO AROUND WHEN TOO HIGH ON VISUAL APCH. STARTED VISUAL APCH BEFORE CLEARED AND THEN LANDED WITHOUT CONTACTING TWR.

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THE INITIAL APCH STARTED AS A 24-25 PROFILE DSCNT FROM THE NW. ON DOWNWIND; N OF THE FIELD; THE INITIAL CONFUSION AROSE WHEN I THOUGHT I HEARD; 'EXPECT 24R;' AND THE FO FE UNDERSTOOD 25R. APCH THEN SAID; 'SLOW TO 160; TURN TO 160 DEG;' AND; 'DID WE HAVE TFC THAT HE WANTED US TO FOLLOW FOR RWY 25'? WE DIDN'T HAVE THE TFC. HE GAVE US ANOTHER TURN TO 230 DEG AND DELAYED OUR DSCNT WAITING FOR US TO CALL THE TFC. IN THE MEANTIME; WE HAD CONFIRMED 25R AND I HAD CONFIGURED HOPING TO STILL MAKE IT DOWN. WHEN CLRED THE VISUAL; THE CTLR SAID SOMETHING TO THE EFFECT THAT HE HAD PROBABLY TURNED US TOO TIGHT. WE SAID WE'D TRY TO MAKE IT. AT 1000 TO 1500' AGL; I BROKE OFF THE APCH AND WENT AROUND BECAUSE WE WERE TOO STEEP. THE GO AROUND WAS UNEVENTFUL. WE WERE THEN VECTORED S OF THE FIELD ON DOWNWIND FOR RWY 25L. AT 8-10 DUE ON DOWNWIND AT 5000' MSL; APCH ASKED IF WE HAD COMPANY WDB AT 10 O'CLOCK. WE DID NOT. AFTER A SHORT TIME; WE CALLED THE WDB IN SIGHT AND ON HIS RESPONSE; I THOUGHT WE WERE CLRED THE VISUAL BEHIND THE WDB AND STARTED MY TURN. IN THE TURN; THE CTLR ASKED US IF WE HAD AN SMT ON THE NOSE SBND FOR A TURN INTO 25R. WE HAD AN ACFT BUT COULDN'T IDENTIFY IF HE WAS AN SMT. THE CTLR SAID MAINTAIN 3000' UNTIL SMT IN SIGHT. BY THIS TIME; WE SAID WE HAD THE TFC; BUT IT LOOKED LIKE AN MDT OR AN MDT. WE DESCRIBED HIM AS JUST FORWARD AND TO THE RIGHT. HE WAS LINED UP FOR 25R; WE WERE LINED UP FOR 25L BY THIS TIME. WE WERE THEN CLRED TO CONTINUE THE VISUAL APCH AND CLRED TO LAND. THE REST OF THE APCH SEEMED TO PROCEED NORMALLY UNTIL AFTER LNDG WHEN APCH SENT US TO TWR FREQ. NONE OF US HAD CAUGHT THE FACT THAT WE WERE NOT ON TWR FREQ; AND I FEEL REASONABLY SURE WE SHOULD HAVE BEEN. WHEN WE SWITCHED TO TWR; HE DIDN'T QUESTION OUR LNDG CLRNC AND; SO; I ASSUMED IT HAD BEEN PASSED ON APCH FREQ; AS WE HAD CONFIRMED IN THE COCKPIT AT 1000' AGL PRIOR TO LNDG. AFTER LNDG; I CALLED TO THE SUPVR AT TRACON AND HE SAID THEY HAD TURNED US WAY TOO TIGHT ON THE FIRST APCH. HOWEVER; HE SAID WE WERE NOT CLRED THE VISUAL APCH WHEN WE TURNED FROM DOWNWIND TO FINAL FOR THE SECOND APCH. I OBVIOUSLY THOUGHT WE WERE; BUT COULDN'T REMEMBER THE EXACT CONVERSATION. HE ALSO QUESTIONED WHETHER WE HAD DSNDED BELOW 3000' ASSIGNED PRIOR TO CALLING THE COMMUTER TFC TURNING IN FOR 25R. I EXPLAINED WE HAD NOT AND THE CONFUSION OVER WHAT TYPE OF ACFT HE ACTUALLY WAS. WE DISCUSSED WHAT WE HAD LEARNED IN TERMS OF COM AND VISUAL APCHES; AND HE SAID HE FELT THE SITUATION WAS SETTLED. I THINK CONFUSION IS THE KEY WORD HERE. I HAVEN'T BEEN INTO LAX AS A CAPT BEFORE AND THE COPLT HAD NEVER BEEN THERE AS A CREW MEMBER. THE INITIAL CONFUSION WITH THE ASSIGNED RWY ON THE 1ST APCH CARRIED OVER TO THE 2ND APCH AND LED TO A BREAKDOWN IN CREW COORD AS EVIDENCED BY THE MISUNDERSTOOD VISUAL APCH CLRNC AND LNDG ON APCH FREQ. I SENSED THIS AFTER THE GO AROUND AND CALLED FOR THE ENTIRE APCH AND LNDG CHKLIST AND SLOWED TO 190 ON DOWNWIND TO SLOW THINGS DOWN AND REGROUP. THERE WERE NUMEROUS RADIO CALLS MADE BY US THAT WERE NOT ANSWERED AT THIS TIME DUE TO TFC SATURATION WHICH ADDED TO THE CONFUSION. WITH ALL THE TFC BEING CALLED OUT; I HONESTLY FOCUSED ON FLYING THE JET AND LOOKING OUTSIDE; PERHAPS TOO MUCH SO. WITH ALL THE CONFUSION; THE FO AND FE EITHER MISUNDERSTOOD THE CLRNC ALSO; OR WERE SO FAR BEHIND THAT THEY DIDN'T CATCH IT OR QUESTION IT. IN THE FUTURE; WHEN I SENSE THIS CONFUSION; I INTEND TO QUESTION THE CTLR MORE CLOSELY. I ALSO INTEND TO BE MORE SELECTIVE IN THE USE OF THE VISUAL APCH. MOST IMPORTANTLY; I'M GOING TO SPECIFICALLY BRIEF CREW COORD FROM THE STANDPOINT OF THE NEED TO QUESTION ONE ANOTHER IF ANY CONFUSION IN THE COCKPIT SHOULD ARISE.